Apparatus for testing bevel-gear wheels



Feb. 6, 1923.

H. SAUBER. APPARATUS FOR TESTING BEVEL GEAR WHLS.

ORIGINAL FILED MAR. 30. 1920. 2 SHEETS-SHET Feb. 6, 1928. L4M-,526.' H. SAURER APPARATUS FOR TESTING BEVEL GEAR WHEELS.

ORIGINAL man MAR. 3o. 1920. 2 SHEETS-.SHEET 2.

fW/Waf WM 5 Thurgau, t:

ivheels9 the purpose of which gear cutting pair of gears to lptllllittt HIPPOLYT SAUBER, F MiiNNENBlCI-I, Es'tlif'ilElL/ihll)7 ASSIGTOR T0 SOCIETE ANONYME ADOLPHE 0F ABBON, SUL'TZERLAND, A CORPORATION APPARATUS FOR TESTING REVEL-GEAR WHEELS.

Application filed Maron 30, 15%, Serial No. 3'0,021.

To all 'wie om t may con/cemy Be it known that l, Hirronrr SAL-'1min a citizen of the Swiss Republic, residing; at ffchloss En@ nsbergi Mannenbach, Canton .itzerlanrh have invented cerneiv and useful mprovements in ripp'aratus for Testing Bevel-Gear YVheels, or

which the following a specification7 reference being` had to the accompanying` draw lo inns.y forming :i part hereof.

in my igrior Patent 12631472? issued April 23rd, 19318 (Reissue li, dated December i?" lO) l' have disclosed and broadly claimed an apparatus for testing` gear is to indicate and maire a record of imperfections or inaccuracies in the concentricity spacing and form of the teeth of a pair of intermeshing These gears may be as they come 20 from the :gear cutting' machine1 or one may be master geen rthe indication or record made by the apparatus permits such impers fections and inaccuracies to be removed or cci ,ct-ed, and the errors or defects in the achiney by which such imperinaccuracies were caused, to be and the gears thereafter' cut be i. the indicated errors and defects. A, comparison of the rollingaction of the be tested with the roliingd action of tivo circular dislrs of appropriate diameter ratio is secured by an indicating or recor mechanism which preferably includes l scale or ecord blanl: ro-

/2 L* icciious and remedied free tated in harmony With one of the gears and an index; iiurer, pointer or stylus iniiuenced by the acceil ration and decelleration of one in respect to the other as the successive come into and pass through meshing;

40 posi ion. The movement of the pointer or stylus in respect to the dial or record blank indicates or records every depart-ure of either ,gear from true tooth formation.: concentricity. or spacing. The actuating; mechanism for the pointer or stylus includes tivo relatively rotatable members.y one operated in harmony with one gear and the other in harmony with the other `gear and connections between both members and the pointer 5o or stylus whereby readily appreciable movements of the latter result from very slight variations of the rate of rotation of said members.

Renewed May 2G, 1922. Serial No. 563,951.

Q My present invention is an improvement in the general type of apparatus above referred to, and the main object of my invention is to provide certain novel features whereby the device is adapted for the testing of bevel gears. A. further object is to adapt the device for testing gears of various sizes, transmission ratios and angles of axis intersection. A further object is to provide simple means whereby the proper transmission of motion to the members of the indieating` mechanism may be secured Without the necessity for changing both of the disks for each change in pitch diameter or pitch ratio of the gears to be tested, and irrespective of Wide variations in angle or position.

As an important feature of my invention whereby it is adapted for the testingof bevel gears, I provide carriers for the gears whereby the gears may be rotatably supported in mesh with their axes intersect-ing` As another important feature whereby it adapted for gears of different pitch diameters, I provide means whereby the shafts or other carriers ina-y be adjusted length- Wise of the axes of their respective gears. As another important feature whereby it is adapted for lgears Whose axes intersect at different angles, l malte the carriers angularly adjustable in respect to each other.

TFor transmitting motion from gears mounted on adjustable carriers, to the members of the indicating mechanism, irrespective of Whether the 2gears be of bevel or spur type, and irrespective of Whether the adjustment of the carriers be endwise, lateral, or angular7 l provide transmission means which automatically accommodates itself to all possible different relative positions of the carriers, and which does not require any substitution of part-s when one pair of lgears is replaced by another pair of different diameters or angle of intersection of gear axes. but of the same gear transmission ratio. As one important feature, this means for driving one member of the indicating` mechanism includes a pair of spaced transmission disks of diameters appropriate to the gears to be tested and a transmission bar or other member having rectilinear movement in rolling contact with said disks. One disk of said pair may be rotated by and in harmony with one el* the gears, and the other disk may operate one part ot the indicatingmechanism.

In the accompanying drawings in which the invention is illustrated*- Figure l is a view of the improved apparatus partly in elevation and partly .in section in the planes ot the axes of the gears to be tested.

Figure 2 a top 'rievv oi. the saine.

`Figure is a detail view en a larger sci le and in vertical sectionoii a portionA oli the apparatus shown at the right hand end oit Fig-ure l.

Figure i is a similar View or a portieri ofthe apparatus shown at .the lett hand end ot'ligure l.

Figures 5 and 6 are detail views of the indicating and recording mechanism.

Figui-e7 is a det-ail View illustrating' the arrangement or the gears shown in Figure l.

The base l ot the apparatus shoun in the drawings 'toi-nis an arcuate or approximately semi-circular 'track :2 on which are mounted laterally movable slides or carriers 3,8', which can be secured by bolts l, 4 in relative positions determined by the angie of intersection of the axes ot the tvo gears to be tested, and with the point or intersection at the center ot curvature of the track and the axes radial ot the track. In the carriers 3, 8 respectively are mount-ed the sleeve-like supports, (3 which can be moved longitudinally, so as to permit the proper positioning` and internne L gears of different sizes or gear ratio to be tested, the supports, which for convenience are cylindrical in torni, being' held troni rotation in the carriers by suitable splines `5 and held in adjusted position by clamping bolts 7, 7. Within the supports 6 respectively are mounted rotatably the sleeves S, 8, the bore of each being tapered inwardly, as clearly shown in Fig. l, to receive the correspondingoutwardly tapered and split chuck sleeve 9, 9. adapted to receive the shaft or spindle 2S, 2S of the cor responding bevel gear. in order that each chuck sleeve may be drawn into the corre spending' rotatable sleeve and thereby made to grip tightly theshaft or spindle of the corresponding` bevel geai',it is engaged at its inner end by a threaded spindle l0, l0. The

Vspindle lO is formed at its outer end, as at 34;, for engagement by a suitable Wrench. The spindle i0', however, being,` in the same vertical yplane with the shaietl, which is necessarily extended below the spindle 10',

cannot itself vbe formed, outside the casing i6 for engagement lby a suitable Wrench.

To accomplish the desired result the spindle 1 0, which has fixed .thereto the triction gear .13', for engagement ywith the trictiongear Vl5', on theshaft lll below the airis of the spindle l0', has secured. thereonn a gear' ma,

Fig. which is engaged by a gear 10b on a second spindle 10C which is mounted in bearing in the casing it anifl has its outer end, as at 254i, torined tor rngageinent by a suitable wrench.

Thus the gear sha'iiis or spindles are iireely rotatable but may be rigidly cla peil against any other increment, and with their axes intersecting at a tired point and lf. along' radial lines from said xed center. The shafts or spindles are angulrrly ad justable to receive pairs ci' interineshing gears Whose respective angles oi' axis intersection vz ry through "-.vide liinits and Without regard to Agear ratio. 'the shatts or spindles are adjustable longitudinally is. in the direction ot' their axes, for pairs of gears oi' larger or smaller sine2 and the saine gear ratio, or lor gears o' dii'lierent transmission ratio and without regard to the angle between their aires.

Each rotatable sleeve El, ti drivrs, through suitable beveled transmission Whe 1" l5 and lil. l5', .i Uding ve il, il, mounted in si e casings 16, i6 carried by the s.e fie-like supports 6, 6. The beveled tra ission Wheels 13, 15 and 13', l5 are preterablj.v

'friction gears, since they can oe inade perl'ectly circular and thercbv avoid the pos- [re is no danger oii slip il; will cured rigidly,v to the correspor sleeve 8.. and that the c spindle it), iii pn freely gears. lt will be noted that tie shafts le. la? lic in pli e at rie" "t to the plane ot the axes the gears to tested, and that although they are inc'f'ed in rspect to each other by t angular and longitudinal adjust i supports, they maintain their para at all tinies. lt will also be noted that the ratio of the bevel friction gears 13, l5 is not the saine as that of the bevel. 'friction 13', l5', it being` necessaryv in the operation oli the apparatus that the ratios shall be different in order that the stylus and the record card hereinafter mentioned shall rotate at diiifrent rates and the stylus trace on the record card a spiral instead of reniainingf` at one point.

@ne of the vertical shatts 14, le', as, tor example, the right hand shaft, has secured at its upper end, above the casing` 16, a transmission gear or Wheel 17, Which is preferably also a friction disk since it can be made truly circular and, for the reasons l i) ti track, indicating mechanism comprising relatively displaceable members, intermediate devices whereby one member of the indicating mechanism is rotated in harmony with one of said gears and intermediate mechanism whereby the other member of the indieating' mechanism is rotated in harmony with the other of said gears.

2. 1n an apparatus for testing gears the combination` of two rotatable members for supporting in mesh the gears to be tested, shafts corresponding respect'vely to said members, gearing between each member' and its corresponding shaft, whe eby the shafts are driven from said members, an indicating mechanism comprising two relatively displaceable members, means whereby one of' said displaceable members is rotated in harmony with one of said shafts, and means whereby the other of said displaceable members is rotated in harmony with the other of said shafts.

3. ,ln an apparatus-ifm' testing gear wheels, the combinationof two rotatable members for supporting in mesh the gears to be tested, a support on which said nembers are relatively adjustably carried, an indicating mechanism comprising two relatiii'ely displaceable members, means whereby one of said last named members is rotated in harmony with one of said gears, a transmission disk in operative relation with the other of said gears, a second transmission disk in operative relation with the other member of the indicating mechanism, a transmission bar, and means to hold said bar in driving engagement with said disks.

a. ln an apparatus for test-ing bevel gear wheels, the combination of a circular track, relatively movable carriers mounted on said track, devices mounted on said carrier for supporting rotatably and in mesh the gearsl to be tested with their axes radial of said track, indicating mechanism comprising relatively displaceable members, means whereby one of said members is rotated in harmony with one of said gears, a transmission gear in operative relation with the other of said displac-eable members, a second transmission gear in operative relation with the other of the gears to be tested, and means whereby one of said transmission gears is driven from the other in varying positions of said carriers.

5. ln an apparatus for testing gear wheels, the combination of a support, relatively movable carriers mounted thereon, devices mounted on said carriers for supporting rotatably and in mesh the gears to be tested,

indicating mechanism comprising relatively means whereby one displaceable members,

harmony with of said members is rotated in -one of said gears, a transmission gear 1n operative relation with the other of said dis- -placeable members, a second transmission tatably and in mesh their aries intersecting,

intense gear in operative relation with the other ot' the gears to be tested, a transmission bar, and means to hold said bar in driving engagement with said gears in varying positions of said carriers.

6. In an apparatus for testing gear wheels, the combination ofy a support, relatively movable carriers mounted thereon, devices mounted on said carrier for supporting rothe gears to be tested, indicating mechanism comprising relatively displaceable members, of said members is rotated in harmony with one of said gears, a transmission gear in operative relation with the other of said dis- Aplaceable members, a second transmission gear in operative relation with the other of the gears to be tested, a transmission bar, arms swiveled on said carriers, springpressed plungers carried by said arms, and rollers carried by said plungers and ar ranged to press said bar into Adriving engagement with said gears.

7. 1n an apparatus for testing bevel gear wheels, the combination of a circular track, relatively movable carriers mounted on said track, a chuck mounted rotatably in each of said carriers and adapted to engage one of the gears to be tested, a shaft mounted in each of said carriers in operative relation with saidchuck, a transmission gear carried by one of said shafts, an indicating mechanism supported by the other of said shafts and comprising two relatively displaceable members, a sleeve mounted loosely on said lastV named shaft in operative relation with one of themembers of the indicating mechanism, a transmission gear on said sleeve, and means to transmit rotation from the first named transmission gear to the last named transmission gear.

8. An apparatus for testing bevel gears including a pair of supports disposed at an angle to each other, devices mounted in said supports respectively for carrying rotatably, and in mesh, the'bevel gears to be tested with indicating mecha nisni including relatively displaceable members, and operating connections between said devices and the members of said indi eating mechanism respectively.

9. rin apgaratus for testing bevel gears including a pair of supports disposed at an angle to each other' for carrying rotatably and in mesh, the bevel gears to be tested, means whereby said supports are made ad justable in the direction of the axes of their respective devices, whereby gears of different pitch diameters may betested, and indicating mechanism including relatively displaceable members, means whereby one member is driven from one device and means whereby the other member is driven from the other device, a member and means whereby said` last :mentioned member is opn means whereby one reassess erster' uoon a relative displacement oi?. said first named ineinbers.

apoaratus for testing bevel gears, i cludine a wir of supports disposed at an C) ,e to each other lor carrying rotat in mesh the bevel to be TiV i whereby one of said supports is made endwise and laterally adjustsble respect to the other, a pair of relatively 'l ea s whereby said carriers are inade anlgularly adjustable to Very the angle of iniersection of the gear axes,

i i a pair of rele..- f`vely rotatable members, operating connecsaid devices 4and the corresponding inenibers, a pointer, and ineens whereby said pointer is moved back and forth upon relative acceleration deceleration of said ineinbers.

1Q. ,ein apparatus ilor testing bevel gears, including a pair of carriers, ya pair of supports endwise adjustable in respect to said carriers, devices mounted in said supports respectively for raountimg` rotatably and in inesh the gears to be tested., base upon which said carriers yare able to Vary the angle of intersection oi' the gear aires, and indicating mechanism including a part and ineens for operating said part by a variation in the relative rates of rotation or said gears for indicating acceleration ott one geur relative to the other.

E3. -,n apparatus for testing' bevel gears, including e. bese, a pair of curriers niounteeA` thereon, -means whereby one of said carriers is made ano'ularly adjustable in respect to other, gear supports mounted in said carriers and endwise adjustable in respect thereto whereby bevel ci.' various angies, diameters and ratio may be rotatably supported in niesh, and indicating mechaincluding relatively displaceable inein- 's carried by one of said adjustable sup- Lieans for operating one or said in- `nienibers in harmony With the gear i-,d n said support, and ineens includpower transmitting member having r motion for operating the other .i icating members in harmony with oher gear, with the gear supports in af-arying ungularly and longitudinally adjusted positions.

An apparatus for testing,` gears, iucludino a pair of relatively adjustable supports ier rotatably supporting in mesh the to be tested, an indicating mechanism angularl y adj ustg is given one of said s1 .ble connectin L) --zieoiai'ie member hat R AL @Oeil ur of" L tiansiuissi a the otbeio; W r disnlaceable in clucling` u pair oi-'i disks und loi movable ineinl: dislrs. whereby sunnorts fore-e o. i 1 -1- @ne distance 2er s:. tec-tire lengte of seid lo.. member.

l?. Ln apparffitius for i cluding pair o supp-orraountinoa in nies-h pair of Vembers ineens le one gear, means ber from `the l anisin incl f for rotating the other other.l a per or rotatable members with their axes `ih e plone :1t right @regles to theplane of Seid. tiret mentioned means for rotilting one member in harmony with one o? seid gears, means for rotating the other member. in harmony with the other of said gears, eh ndeetg member nml mermefor movngt in one direction upon acceleration of one of the first named membereh `respect to the other.j and in the opposite direction upon deceleration er sad'ret hir-med member in vrespect to the other.

19. A11 apparatus for 'te "ug gears9 neluding mesme for supporting; :mtl rotatably mounting in mesh the gears to be tested with the rtree 'in one )l:a1ej :r pnr'ot rotatable members with their mies in a `plane at right angles to the plane oil? seid rst meutoned mies, mear-ue for rotatng one member in harmony with one of said gears, means member in harmony member nharmony with the other with the other-of` said gears, iudeeteg part and means lor operating vit upon Variatonsio. Vthe relative rates or rotation of Said members. Y

20.. Anlzrpperatus for 4tet'ng bevel gears, ncludngmeens for rotatably supporting e pair of gears in meshoud 'with their aires intersecting, e record blank Support: e pvoted stylus, e. pair of rotatable roemberey means for rotating one member in harmony with one gear, means 'for rotating the other gear, :md im operating member *for seid stylus havhgparieengaging with each of sedpair oflmembere Jror swinging the stylus about its pvot upon variations in the relative of rotation of the nlembers of seid pair.

This speeieetonsgnecl'this 12th day of Merch A. D. 1920.

HllDjPULYT SAUBER. 

